add delimiter as option

src/services/exporter.ts

@@ -109,7 +109,7 @@ export class Exporter {
   }
 
   private _initCsvStream() {
-    const csvStream = csv.createWriteStream({ headers: true })
+    const csvStream = csv.createWriteStream({ headers: true, delimiter: this._task.csvDelimiter })
       .on('error', async e => await this._updateProgress({ status: ExportStatus.ERROR, errorMessage: e.message }));
 
     const writableStream = fs.createWriteStream(this._getFilePath('csv'));

src/types.ts

@@ -102,6 +102,7 @@ export type ExportTask = {
     from: number;
     to: number;
   };
+  csvDelimiter: string;
   progress?: ExportProgress;
   id?: string;
 };